Collapsible vulcanizing form



L. MURRAY.

COLLAPSIBLE VUL CANIZING FORM.

APILICATICN FILED FEB. 28. um.

1,404,217, Patented Jan. 24, 1922,

2 /25 1450mm v5 UNITED STATES PATENT OFFICE.v

LEE MURRAY, OF MINNEAPOLIS, MINNESOTA, ASSIGNOR TO DURKEE-ATWOOD COMPANY, OF MINNEAPOLIS, MINNESOTA, A CORPORATION OF MINNESOTA.

COLLAPSIIBLE VULCANIZING FORM.

Application filed February 28, 1921.

To all whom it may concern:

Be it known that I, LEE MURRAY, a citizen of the United States, resident of Minneapolis, county of Hennepin, State of Minnesota, have invented certain new and useful Imrovements in Collapsible vulcanizing orms, of which the following is a specification.

In the operation of making belts of rubberized fabric, it is customary to place them in a vulcanizing oven as a final step in the belt-making process.

The object of my present invention is to provide an improved type of form or support for the belts during this vulcanizing process, the form being of such construction that it will support a number of the belts and when removed from the vulcanizing oven and is too hot to be handled, the form can be collapsed and the belts released with comparatively little effort on the part of the attendant and without any danger of being burned.

A further object is to provide a form of light, durable construction which can be easily and quickly filled or loaded with the belts and as readily separated therefrom when the vulcanizing process is completed.

The invention consists generally in various constructions and combinations, all as hereinafter described and particularly pointed out in the claims.

In the accompanying part of this specification,

Figure 1 is a plan view of a vulcanizing form embodying my invention,

Figure 2 1s a cross sectional view on line 2-2 of Figure 1,

Figure 3 is a similar view, showing the foim in its collapsed position to release the be ts,

Figure 4 is a perspective view of the clip used for holding the abutting edges of the form in alignment when the form is filled with the belts and during the vulcanizing operation.

In the drawing, 2 re resents the wall of the form, consisting pre erably of sheet metal bent to a cylindrical form of suitable diameter, according to the size of the belt. The peripheral surface of this form is provided with a series of annular grooves 3 arranged in spaced relation in the form. These grooves are adapted to receive a round belt, so called, made of rubberized fabric and drawmgs forming Specification of Letters Patent.

Patented Jan. 24, 1922. Serial No. 448,569.

cylindrical in cross section. The belts after the stretching operation are placed in the grooves in the form and then placed with the form in a vulcanizing oven.

One longitudinal edge of the form has a plate 4 mounted thereon and projecting beyond the edge of the plate to form a seat for the other edge when the form is expanded to assume a cylindrical shape preparatory to vulcanizing. This form in effect consists of a section or pipe that is divided longitudinally, the abutting edges being held in alinement by the plate 4. At each end of the form I prefer to provide clips 5 which bridge the Joint at the abutting ends and serve to hold the edges in alinement, preventing one edge from snapping or slipping by the other and allowing the form to collapse until the attendant is ready to remove the belts after the vulcanizing operation. These clips may be made in any suitable way, but preferably by bending or folding the piece of metal over upon itself to form wings between which the abutting ed es of the cylinder are received and held. is soon as these clips are removed, the belts are unseated from the grooves by any suitable means and the form is collapsed sufiiciently to allow the convenient removal of the belts.

claim as my invention:

1. A vulcanizing form for belts compris ing a member having an annular peripheral seat to receive an endless belt, said member being collapsible for removal of the belt after vulcanizing.

2. A vulcanizing-form for belts, comprising a member having a plurality of annular peripheral seats, each adapted to receive an endless belt, said member being collapsible for removal of the belts after vulcanizing.

3. A vulcanizing form comprising a sheet metal cylindrical member divided longitudinally and having a plurality of annular grooves in its outer surface adapted to receive fabric belts, cylindrical in cross section, said member being adapted to collapse and relieve outward pressure on said belts, and means for holding the abutting edges of said member in aline'ment when the form is in use.

4. A vulcanizing form for belts comprising a member having a plurality of annular peripheral seats-each adapted to receive an endless belt, cylindrical in cross section, said member being collapsible for removal of the ed to collapse and relieve outward pressure beltsafler vulcanizingi" on said-belts, "flhd'niezin's fer holding" the 5. A' 'ulcahiz'ingform comprising a sheet fibut t'ing edge Ofs'aidmember in' hlignmeht 10 metalcylihdricalmen' r divided longitudiwhenflthefbrm is in use;

5 Hall and having Wfiluriml'itY of *anmilar Iri Witness whereof, I have hereunto set 'gro'oves in its outer surface adapted"tore'- my handrhis 23dclay of Feb'rus'xr 1921.

ceive fabricbelts', seicl' member "bei'xig" adapt- BAY. 

